Hello, this is the only Valerian II coin I have. I bought the coin some days ago as uncleaned and I spend some time to clean and identify it. Is the issue with the late-Latin spelling variant PRINCIPI IVBENTVTIS in the reverse legend, instead of the usual IVVENTVTIS.
Seems like they struck good ones at the beginning of Valerian II's time but somewhat worse ones as time passed, more debasement, etc. We see the same things in the coins of Valerian Sr. and Gallienus.